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Synthesis 1992; 1992(10): 914-916
DOI: 10.1055/s-1992-26257
short paper
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A Convenient Synthesis of (±)-4-Prenylpterocarpin

Antonio L. Coelho* , Mario L. A. A. Vasconcellos, Alessandro B. C. Simas, Jaime A. Rabi, Paulo R. R. Costa
  • *Núcleo de Pesquisas de Produtos Naturais, Centro de Ciências da Saúde, Bloco H, Ilha da Cidade Universitária, 21941, Rio de Janeiro, RJ, Brazil
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Publikationsdatum:
17. September 2002 (online)

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Coupling of 7-methoxy-8-(3-methyl-2-butenyl)-2H-1-benzopyran (4a) with 2-chloromercurio-4,5-methylenedioxyphenol (5) yields (±)-6a, 12a-cis-dihydro-3-methoxy-4-(3-methyl-2-butenyl)-6H-[1,3]dioxolo [5,6]benzofuro[3,2-c][1]benzopyran (6; ±-4-prenylpterocarpin) in an efficient manner. An improved procedure for the preparation of chromenes is reported.